Pong was created by Al Alcorn for Atari in 1972. Pong was made of circuits. Pong has now been implemented in Paul Falstad's Circuit Simulator, as ported to Javascript by Iain Sharp. So now you may watch the abstract wires glow and the dream electrons shine as you play or watch Pong on your pocket computer.
In this circuit, the horizontal counters have been removed to speed up the simulation. The analog parts of the circuit (like the serve timer and the paddle timers) have also been removed. Now you can actually play the game. You can still slow the simulation down enough to step through it line-by-line.
You can move the paddles with the mouse. There is also an autoplay mode if you're as bad at this game as I am.